Research on the bottom hole size of internal thread extrusion

Hou, Hongling; Zhang, Guangpeng; Chen, Xin

doi:10.1007/s00170-022-08826-9

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…In order to achieve a better working condition of the trapezoidal thread structure, the thread model needs to be further optimized. By arranging and analyzing multi-factor tests through orthogonal experimental design and analyzing the results of some representative tests, we can understand the situation of all factor tests and then find out the optimal combination of each factor level [27]. The best combination of factor levels can be found.…”

Section: Orthogonal Design Of Experimentsmentioning

confidence: 99%

Multifactor exploration and multi-objective optimization of trapezoidal threads

Zhou,

yan,

Zhou

et al. 2024

Preprint

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Threaded drive mechanism is widely used in many industries and fields, is an indispensable and important part of the mechanical transmission field, the study and optimization of the parameters of the trapezoidal thread in the transmission system can effectively improve the performance of the threaded drive mechanism. This paper takes the screw nut mechanism of a company's screw elevator as the research object, and researches the influence of its trapezoidal thread's main 4 parameters on the structural performance, and optimizes it. The thesis research is based on ansys software dynamics simulation, using orthogonal experimental design to study the influence of pitch, thread head number, trapezoidal thread tooth angle and tooth height on the dynamic performance of structural components, through the polar analysis of the 4 kinds of influencing factors for the degree of importance of the ranking, and the introduction of the modal frequency, the efficiency of the parameter target optimization results, to determine the best parameter combination design scheme. The results showed that the equivalent stress decreased by 29.1%, the 1st order modal frequency increased by 24.5%, and the transportation rate increased by 11.1%. The results supplement the relevant research results in the field of threads and provide theoretical support for the further development and safe application of trapezoidal thread structures in screw drives in the future.

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Section: Orthogonal Design Of Experimentsmentioning

confidence: 99%

Multifactor exploration and multi-objective optimization of trapezoidal threads

Zhou,

yan,

Zhou

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Li et al [11][12][13] elaborated the principle and characteristics of thread extrusion forming, and pointed out the plastic flow law of materials in the extrusion process. In recent years, Hou et al [14][15] analyzed the influence of critical process parameters of temperature and torque in the extrusion process of internal thread of alloy steel and the combination of machining parameters was optimized. Zuo et al [16] used low-frequency vibration to extrude trapezoidal threads and studied the influence of low-frequency torsional vibration on torque during extrusion.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of the Effect of Cold Extrusion Process on Residual Stress and Fatigue Life of Internal Thread of High Strength Steel

Wan

He²,

Jing³

et al. 2022

Preprint

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The internal thread cold extrusion process is improved to further increase the fatigue life of diesel connecting rod in order to improve its fatigue performance. Based on three-dimensional finite element model, the residual stress distribution around the cold extruded internal thread of 42CrMo4 high-strength steel plate hole structure under different edge distance ratios is analyzed in detail. The multiaxial fatigue life prediction model of thread is established based on stress-strain method, the accuracy and feasibility of the prediction model was further proved by fatigue experiments. The thread surfaces are examined by utilizing the scanning electron microscope, coordinate with the X-ray diffraction method to measure the residual stress of thread, the relationship between the residual stress distribution, surface structure and fatigue life of the extruded thread is revealed. The research shows that the improved fatigue prediction model gives a satisfactory accuracy in predicting the fatigue life, both of the tangential residual stress fields around the extruded thread and the surface structure have a certain influence on its fatigue life, especially when the edge distance ratio is less than 2. The tangential residual compressive stress of the cold extruded internal thread decreases with when the edge distance ratio being smaller, while the depth of the stress zone increases firstly and then decreases. Higher load will greatly reduce the fatigue life and dispersion of the thread, the fatigue life increases linearly with the increase of the edge distance ratio under lower stress level.

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Numerical and experimental investigation of the effect of cold extrusion process on residual stress and fatigue life of internal thread of high-strength steel

Wan

Jing

et al. 2023

Int J Adv Manuf Technol

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Research on the bottom hole size of internal thread extrusion

Cited by 3 publications

References 12 publications

Multifactor exploration and multi-objective optimization of trapezoidal threads

Multifactor exploration and multi-objective optimization of trapezoidal threads

Numerical and Experimental Investigation of the Effect of Cold Extrusion Process on Residual Stress and Fatigue Life of Internal Thread of High Strength Steel

Numerical and experimental investigation of the effect of cold extrusion process on residual stress and fatigue life of internal thread of high-strength steel

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